“For this project I made a box that opens by using sonars, LED strips and 1 servo motor. The main idea behind this is that you use two sonars that both have a “sweet spot”. If you hit both these sweet spots the servo moves and opens the lock. The LED’s are used to visualize the sweet spots.
For this project you will need:
1 Neopixel strip that’s 1 meter long with 30 LED’s in total 2 HC - SR04 Sonars 1 Neopixel LEDring with 12 neopixels 3 220 OHM resistors 1 arduino UNO A breadboard Wires 1 box”